Derrick Boat Operator – Barge-crane operator, deck-engine operator, derrick-barge operator, floating-derrick operator, scow-derrick operator Operates derrick mounted on boat or barge to lift and move heavy objects: Moves control levers and pedals of hoist to rotate, raise, or lower derrick boom and to raise or lower loadline and load attached to it. May also move controls of small engines or hoists to push against bottom of body of water with spuds (heavy poles) to move barge from place to place. When derrick boat is self-propelled, operator may also be required to possess Master’s license issued by U.S. Government.